A person walks at a speed of 2 km/hr and reaches a destination in 4 hours. If the person increases the speed by 3 km/hr, how much earlier will they reach the destination?

Correct option is A

Given:
S1 = 2 km/hr, T1 = 4 hours
S2 = 2 + 3 = 5 km/hr
Formula Used:
Distance = S1 $$\times$$​T1
T2 = Distance / S2
Time saved = T1 - T2
Solution:
Distance = 2 $$\times$$​ 4 = 8 km
T2 = 8 / 5 = 1.6 hours
Time saved = 4 - 1.6 = 2.4 hours
So the correct answer is (a).